Issue #3417499: Fix ESLint errors for the Field Example module

Closes #3417499

modules/field_example/field_example.js

@@ -4,13 +4,13 @@
  */
 
 /**
- * Provides a farbtastic colorpicker for the fancier widget.
+ * Provides a color picker for the fancier widget.
  */
 (function ($) {
   Drupal.behaviors.field_example_colorpicker = {
     attach() {
       $('.edit-field-example-colorpicker').on('focus', function (event) {
-        const edit_field = this;
+        const editField = this;
         const picker = $(this)
           .closest('div')
           .parent()
@@ -19,9 +19,9 @@
         $('.field-example-colorpicker').hide();
         $(picker).show();
         $.farbtastic(picker, function (color) {
-          edit_field.value = color;
-        }).setColor(edit_field.value);
+          editField.value = color;
+        }).setColor(editField.value);
       });
-    },
+    }
   };
 })(jQuery);